S Calc - Simple Calculator by Mohammed Benguedda is a full-featured calculator app for Android that allows you to perform basic operations as well as engineering calculations. The app comes with a user-friendly interface and offers a wide range of features that make it stand out from other calculator apps.

The app's key features include the ability to perform four fundamental operations and engineering calculations. You can also check the calculation history and use all the previously inputted formulas. Moreover, the app allows you to convert units for various types like currency, area, length, temperature, volume, mass, data, speed, time, date, BMI, discount, age, numeral system, GST, split bill, frequency, fuel, angle, pressure, force, power, and loan.

In addition to these features, S Calc - Simple Calculator also comes with an option to change the theme mode, color, and language. You can also customize the app by selecting the preferred numeral format, decimal places, and number format. The app also allows you to enable/disable full screen, keep the screen on, and keep calculation records. Lastly, the app comes in a small size and is completely free.